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1da177e4 LT |
1 | #ifndef _X86_64_PAGE_H |
2 | #define _X86_64_PAGE_H | |
3 | ||
4 | #include <linux/config.h> | |
5 | ||
6 | /* PAGE_SHIFT determines the page size */ | |
7 | #define PAGE_SHIFT 12 | |
8 | #ifdef __ASSEMBLY__ | |
9 | #define PAGE_SIZE (0x1 << PAGE_SHIFT) | |
10 | #else | |
11 | #define PAGE_SIZE (1UL << PAGE_SHIFT) | |
12 | #endif | |
13 | #define PAGE_MASK (~(PAGE_SIZE-1)) | |
14 | #define PHYSICAL_PAGE_MASK (~(PAGE_SIZE-1) & (__PHYSICAL_MASK << PAGE_SHIFT)) | |
15 | ||
16 | #define THREAD_ORDER 1 | |
17 | #ifdef __ASSEMBLY__ | |
18 | #define THREAD_SIZE (1 << (PAGE_SHIFT + THREAD_ORDER)) | |
19 | #else | |
20 | #define THREAD_SIZE (1UL << (PAGE_SHIFT + THREAD_ORDER)) | |
21 | #endif | |
22 | #define CURRENT_MASK (~(THREAD_SIZE-1)) | |
23 | ||
24 | #define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1)) | |
25 | #define LARGE_PAGE_SIZE (1UL << PMD_SHIFT) | |
26 | ||
27 | #define HPAGE_SHIFT PMD_SHIFT | |
28 | #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) | |
29 | #define HPAGE_MASK (~(HPAGE_SIZE - 1)) | |
30 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) | |
63551ae0 | 31 | #define ARCH_HAS_HUGETLB_CLEAN_STALE_PGTABLE |
1da177e4 LT |
32 | |
33 | #ifdef __KERNEL__ | |
34 | #ifndef __ASSEMBLY__ | |
35 | ||
36 | void clear_page(void *); | |
37 | void copy_page(void *, void *); | |
38 | ||
39 | #define clear_user_page(page, vaddr, pg) clear_page(page) | |
40 | #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) | |
41 | ||
42 | #define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr) | |
43 | #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE | |
44 | /* | |
45 | * These are used to make use of C type-checking.. | |
46 | */ | |
47 | typedef struct { unsigned long pte; } pte_t; | |
48 | typedef struct { unsigned long pmd; } pmd_t; | |
49 | typedef struct { unsigned long pud; } pud_t; | |
50 | typedef struct { unsigned long pgd; } pgd_t; | |
51 | #define PTE_MASK PHYSICAL_PAGE_MASK | |
52 | ||
53 | typedef struct { unsigned long pgprot; } pgprot_t; | |
54 | ||
55 | #define pte_val(x) ((x).pte) | |
56 | #define pmd_val(x) ((x).pmd) | |
57 | #define pud_val(x) ((x).pud) | |
58 | #define pgd_val(x) ((x).pgd) | |
59 | #define pgprot_val(x) ((x).pgprot) | |
60 | ||
61 | #define __pte(x) ((pte_t) { (x) } ) | |
62 | #define __pmd(x) ((pmd_t) { (x) } ) | |
63 | #define __pud(x) ((pud_t) { (x) } ) | |
64 | #define __pgd(x) ((pgd_t) { (x) } ) | |
65 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
66 | ||
d0537508 EB |
67 | #define __PHYSICAL_START ((unsigned long)CONFIG_PHYSICAL_START) |
68 | #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START) | |
1da177e4 LT |
69 | #define __START_KERNEL_map 0xffffffff80000000UL |
70 | #define __PAGE_OFFSET 0xffff810000000000UL | |
71 | ||
72 | #else | |
d0537508 EB |
73 | #define __PHYSICAL_START CONFIG_PHYSICAL_START |
74 | #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START) | |
1da177e4 LT |
75 | #define __START_KERNEL_map 0xffffffff80000000 |
76 | #define __PAGE_OFFSET 0xffff810000000000 | |
77 | #endif /* !__ASSEMBLY__ */ | |
78 | ||
79 | /* to align the pointer to the (next) page boundary */ | |
80 | #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) | |
81 | ||
82 | /* See Documentation/x86_64/mm.txt for a description of the memory map. */ | |
83 | #define __PHYSICAL_MASK_SHIFT 46 | |
84 | #define __PHYSICAL_MASK ((1UL << __PHYSICAL_MASK_SHIFT) - 1) | |
85 | #define __VIRTUAL_MASK_SHIFT 48 | |
86 | #define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1) | |
87 | ||
88 | #define KERNEL_TEXT_SIZE (40UL*1024*1024) | |
89 | #define KERNEL_TEXT_START 0xffffffff80000000UL | |
90 | ||
91 | #ifndef __ASSEMBLY__ | |
92 | ||
93 | #include <asm/bug.h> | |
94 | ||
95 | /* Pure 2^n version of get_order */ | |
96 | extern __inline__ int get_order(unsigned long size) | |
97 | { | |
98 | int order; | |
99 | ||
100 | size = (size-1) >> (PAGE_SHIFT-1); | |
101 | order = -1; | |
102 | do { | |
103 | size >>= 1; | |
104 | order++; | |
105 | } while (size); | |
106 | return order; | |
107 | } | |
108 | ||
109 | #endif /* __ASSEMBLY__ */ | |
110 | ||
111 | #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) | |
112 | ||
113 | /* Note: __pa(&symbol_visible_to_c) should be always replaced with __pa_symbol. | |
114 | Otherwise you risk miscompilation. */ | |
115 | #define __pa(x) (((unsigned long)(x)>=__START_KERNEL_map)?(unsigned long)(x) - (unsigned long)__START_KERNEL_map:(unsigned long)(x) - PAGE_OFFSET) | |
116 | /* __pa_symbol should be used for C visible symbols. | |
117 | This seems to be the official gcc blessed way to do such arithmetic. */ | |
118 | #define __pa_symbol(x) \ | |
119 | ({unsigned long v; \ | |
120 | asm("" : "=r" (v) : "0" (x)); \ | |
121 | __pa(v); }) | |
122 | ||
123 | #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) | |
2b97690f MT |
124 | #define __boot_va(x) __va(x) |
125 | #define __boot_pa(x) __pa(x) | |
126 | #ifdef CONFIG_FLATMEM | |
1da177e4 LT |
127 | #define pfn_to_page(pfn) (mem_map + (pfn)) |
128 | #define page_to_pfn(page) ((unsigned long)((page) - mem_map)) | |
129 | #define pfn_valid(pfn) ((pfn) < max_mapnr) | |
130 | #endif | |
131 | ||
132 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) | |
133 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) | |
134 | #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) | |
135 | ||
136 | #define VM_DATA_DEFAULT_FLAGS \ | |
137 | (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ | |
138 | VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
139 | ||
140 | #define __HAVE_ARCH_GATE_AREA 1 | |
141 | ||
142 | #endif /* __KERNEL__ */ | |
143 | ||
144 | #endif /* _X86_64_PAGE_H */ |